Which Cisco Nexus switch offers possibilities for implementation of the virtual switching layer in VMware?

Which Cisco Nexus switch offers possibilities for implementation of the virtual switching layer in VMware?

A.
Cisco Nexus 5596 Switch

B.
Cisco Nexus 7010 Switch

C.
Cisco Nexus 1000v Switch

D.
Cisco Nexus 2248 FEX